Improvement in drawing-slates



C. C. SHEPHERD. DRAWING-SLATE.

Patentd July 17, 1877.

lllIllllll/lll ll N PETERS. PHOTOLITHOGRAPHER, WASHMGTON, D C,

UNITED TATES PATNT QFFIGE.

CHARLES C. SHEPHERD, OF PASSAIG, NEW JERSEY.

IMPROVEMENT IN DRAWlNG-SLATES.

Specification forming part of Letters Patent No. 193,099, dated July 17,1877; application filed October 16, 1876.

To all whom it may concern:

Be it known that I, CHARLES C. SHEPHERD, of Passaic, in the county ofPassaic and- State of New Jersey, have invented an Improvement inDrawing-Slates, of which the following is a specification:

in Letters Patent No. 165,126 granted to me June 29, 1875, a slate isshown in the form of a desk with movable copy-slips, and it is common tomake use of a piece of ground glass upon which to draw with lead-pencil.

My present invention relates to an improvement upon my aforesaid slatewhereby the copy-slipsare confined in a convenient posi-- tion to bechanged, and a glass slate is added to the desk in such a manner that itmay be used when the desk is turned upside down, forming a reversibleinclined desk.

In the drawing, Figure 1 is a section of the slate complete. Fig. 2represents the slate portion after the copy slips have been removed, andFig. 3 shows the desk as turned over and the cover of the transparentslate removed.

The desk portion of this apparatus is composed of a quadrangular frame,a b c, the back a being wider than the front b, so that the slate dforming one surface is sloping or inclined. There is a box, 6, for thereception of the movable copy-slips f similar to that in my aforesaidpatent, only the copy-slips all lie in one pile, and the upper one isexposed to view. There are springs h in the bottom of the box 6 thatlift the pile of slips and cause them to hold at their ends beneath therabbets of the frame. The strip of tape is is pulled upon to give endmotion to the slip and liberate such slips at one end from beneath therabbet, so that they may be lifted V out of the box 6 and changed. Theyare insorted by a reverse movement in which the strip is is pushedbeneath the right-hand rabbet by the end of the slip, after the lefthandend has been inserted beneath its rabbet, the space in the box beingsufficient to allow of this movement.

The bottom of the desk is made as a sliding panel, I, fitting at itsedges within grooves in the frame b c c, and hence the desk portion ishollow. I employ this for receiving the transparent drawing-slate orglass m that sets within the inclosing partitions n and rests upon thedrawings or pictures to be copied. There is a notch at one portion ofthe partition n that allows'the glass to be lifted in obtaining accessto the drawings beneath. The glass is held in place by the sliding panell, when inserted, so that it is not liable to fall out when the desk isturned over.

The space it at the side of the glass m can be used for a rubber that isused to clear either of the slates, and there are also spaces u v at theback of the box a for the reception of the ruler, pencils, &c.

I claim as my invention- 1. The combination, with the slate d, frame a,b c, and movable copy-slipsf, of the springs it placed beneath the slipsand within the box 0, as set forth. 1

2. The ground glass m and thc inclosingframe n, applied within the framea b c, in combination with the sliding panel l, substantially as setforth.

3. The reversible inclined desk-frame having a'slate attached at oneside thereof and a receptacle at the other side, containing 'picturesand a transparent groundglass draw ing-slate, substantially as setforth.

Signed by me this 9th day of October, A. D. 1876.

. CHAS. G. SHEPHERD.

Witnesses:

GEO. T. PINOKNEY, CHAS. H. SMITH.

